package com.ntu.rent.common.util;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Repository;

import com.ntu.rent.common.base.RentJdbc;




@Repository
public class SpringBeanUtil implements ApplicationContextAware {
   private static ApplicationContext applicationContext;     //Spring应用上下文环境
  
   /**
   * 实现ApplicationContextAware接口的回调方法，设置上下文环境   
   * @param applicationContext
   * @throws BeansException
   */
   public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
	   SpringBeanUtil.applicationContext = applicationContext;
   }
  
   /**
   * @return ApplicationContext
   */
   public static ApplicationContext getApplicationContext() {
     return applicationContext;
   }
  
   /**
   * 获取对象   
   * @param name
   * @return Object 一个以所给名字注册的bean的实例
   * @throws BeansException
   */
   public static Object getBean(String name) throws BeansException {
     return applicationContext.getBean(name);
   }
  
   /**
   * 获取类型为requiredType的对象
   * 如果bean不能被类型转换，相应的异常将会被抛出（BeanNotOfRequiredTypeException）
   * @param name       bean注册名
   * @param requiredType 返回对象类型
   * @return Object 返回requiredType类型对象
   * @throws BeansException
   */
   @SuppressWarnings("unchecked")
public static Object getBean(String name, @SuppressWarnings("rawtypes") Class requiredType) throws BeansException {
     return applicationContext.getBean(name, requiredType);
   }
  
   /**
   * 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true 
   * @param name
   * @return boolean
   */
   public static boolean containsBean(String name) {
     return applicationContext.containsBean(name);
   }
  
   /**
   * 判断以给定名字注册的bean定义是一个singleton还是一个prototype。
   * 如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）   
   * @param name
   * @return boolean
   * @throws NoSuchBeanDefinitionException
   */
   public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
     return applicationContext.isSingleton(name);
   }
  
   /**
   * @param name
   * @return Class 注册对象的类型
   * @throws NoSuchBeanDefinitionException
   */
   @SuppressWarnings("rawtypes")
public static Class getType(String name) throws NoSuchBeanDefinitionException {
     return applicationContext.getType(name);
   }
  
   /**
   * 如果给定的bean名字在bean定义中有别名，则返回这些别名   
   * @param name
   * @return
   * @throws NoSuchBeanDefinitionException
   */
   public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
     return applicationContext.getAliases(name);
   }
   
   /**
    * 返回Spring中所有Bean的定义   
    * @param name
    * @return
    * @throws NoSuchBeanDefinitionException
    */
    public static String[] getBeanDefinitionNames() throws NoSuchBeanDefinitionException {
      return applicationContext.getBeanDefinitionNames();
    }
    
    public static RentJdbc getHdsSysJdbcBean()
    {
    	return (RentJdbc)getBean("rentDb");
    }

 }
 